You Don't Need To Avoid Buying Grapes That Are Covered In A White Powdery Substance. Here's Why - Chowhound

Ipopba/Getty Images You're in the grocery store, looking through clusters of grapes, trying to find the perfect bunch. You've found some contenders, but what's this? There's a light, white powdery substance coating them all. While conventional wisdom may tell you to put that tainted fruit right back for fear of mold, the truth is that a cloudy appearance on grapes (or other fruit like plums, blueberries, and…